MAD MEN star January Jones has split from her funnyman boyfriend Jason Sudeikis, according to U.S. reports.The couple became a hot Hollywood item last summer (10) but never spoke publicly about their romance. A source tells People.com, "They've been on and off for a few months and then the long distance kind of ended it." Jones lives and works in Los Angeles, while Sudeikis, a Saturday Night Live regular, is based in New York.